123,586 reputation
8117239
bio website von-eitzen.de/math/tntrep.xml
location Bonn, Germany
age 48
visits member for 2 years, 3 months
seen 4 hours ago

I did study math and had a knack for it, but I am sooo out of that business now ...


Feb
6
comment Rewrite set theory formal
It looks like half your $:$ should be $\to $.
Feb
6
comment Bourbaki on the fact that continuous function on a compact is uniformly continuous
Btw, shouldn't $X$ be a uniform space as well? In other words: I don't recall if compact needs Hausdorff or not in Bourbaki
Feb
5
comment Bourbaki on the fact that continuous function on a compact is uniformly continuous
Do yo understand the usual proof for metric space $X'$? The formulation with uniform spaces and entourages is mostly jsut a "translation".
Feb
5
comment Is this a linear relationship and is this equation valid?
Don't be confued just because the "cause" bouquet number gets eliminated! Functions are only cum hoc, not necessarily propter hoc, so to speak.
Feb
5
comment Big O notation - Proving that a function is not O(n)
What is 4n2? $4n^2$?
Feb
5
reviewed Close What is the basis and rank of matrix in linear algebra?
Feb
5
answered The period of the function $f(x)=a\cdot \sin(ax)+a$
Feb
5
answered Notation for a subset of a powerset
Feb
5
awarded  Nice Answer
Feb
5
answered Question about the boundary of a set
Feb
5
answered Proving a recurrence relation for strings of characters containing an even number of $a$'s
Feb
5
revised Proving a recurrence relation for strings of characters containing an even number of $a$'s
added 63 characters in body
Feb
5
answered Altering an Infinite Set does not change cardinality
Feb
5
answered Is there any function that has the series expansion $x+x^{\frac{1}{2}}+x^{\frac{1}{3}}+\cdots$?
Feb
5
answered Finding the better coin: what is the probability of success?
Feb
5
answered $\sum_{k=0}^n k \binom{n}k=n\cdot2^{n-1}$
Feb
5
answered Can all real numbers be presented via a natural number and a sequence in the following way?
Feb
5
answered Different proof for; in a convex set $ A,\ \bar { \mathring{ A }} \supset\bar A $?
Feb
5
answered The number of ordered triples $(a, b, c)$ of positive integers which satisfy the simultaneous equations $ab + bc = 44$, $ac + bc = 33$
Feb
5
comment how do we assume there is infinity?
What is this Universe people talk about so much recently?